Circular saw



FIG. 1 is a top, front and left side perspective view of a circular sawshowing our new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a bottom plan view;

FIG. 6 is a left side elevational view; and

FIG. 7 is a right side elevational view thereof.

The ornamental design of a circular saw, as shown. 